Amendment C: amends the State Constitution to allow and recognize marriage only between a man and a woman. It would also prohibit the Legislature from allowing or recognizing civil unions, domestic partnerships or other quasi-marital relationships between two or more persons regardless of sex.

Source for Popular Vote data: South Dakota Secretary of State. General Election Official Returns for Ballot Questions, South Dakota Secretary of State (http://www.sdsos.gov/electionsvoteregistration/pastelections_electioninfo06_GEballotquestions.shtm) (accessed 03 Jan 2007)